Validate existing structured data and see what should be added for the selected website and page type.
The ITSEO Schema Markup Validator delivers comprehensive diagnostics and actionable recommendations for structured data in JSON-LD, Microdata, and RDFa formats. Beyond basic Schema.org syntax verification, the tool evaluates your markup against the specific business profile and page type — including ecommerce, service providers, local businesses, corporate portals, SaaS platforms, and content media. This provides clear visibility into which entities are properly implemented, which required properties are missing for Google rich results and Yandex snippets, and which atypical structures should be reviewed.
The audit is performed directly on raw server-rendered HTML (SSR), reflecting the industry gold standard in technical SEO: markup served directly from the server is immediately accessible to all search engines, AI search crawlers (Google AI Overviews, Perplexity, Copilot), and social graph parsers without relying on delayed client-side JavaScript execution. The validator intelligently distinguishes top-level entities from nested helper objects (such as shipping details, geographic coordinates, or sitelinks search actions), preventing false positive warnings.
Each recommendation includes precise property requirements, field descriptions, and best-practice examples. When missing or incomplete markup is detected, you can seamlessly transition to the ITSEO Schema Markup Generator with prefilled page data to create valid, error-free JSON-LD in seconds and boost your search appearance.